Qubit ZooFirst experimental evidence for topological superconductivity in planar Josephson junctions. InAs 2DEG with epitaxial Al contacts shows closing and reopening of the induced superconducting gap as a function of in-plane magnetic field and phase difference — consistent with a topological phase transition. The planar geometry represents a scalable alternative to nanowire-based Majorana platforms.
Key Results
- Gap closing and reopening observed in InAs/Al planar Josephson junction
- Phase-dependent topological transition consistent with Pientka et al. theory
- Epitaxial Al-InAs 2DEG heterostructure
- Scalable planar geometry for Majorana-based qubits
Links
- Journal: Nature
- arXiv: 1809.03037